I've been looking for one too
what i have found
buy the unit from an online car stereo store, they will have it for cheap
and spend the money on the instal
lots of places will offer you a 2 way system installed for that kind of money BUT they wont hook everything up the more they connect the more time and money it will cost, Me and a few buddies bought a clifford system online, MSRP 600 got it for 200 turns out its like top top top of the line who knew? and we took it down to a local electronics store (A&B sound) they do car audio stuff along with anythign that has wires
we payed 150 for an install and asked if that was everything, the guy said yup thats all, so we get the car back the next day, and unlike most people we go straight to a local Car audio visual shop (performance audio) and have them check it out, turns out half the stuff wasnt even touched
things that i said i wanted weren't done etc (level control, remote shut off, valet mode, and a few other small lil things) we had performance do the rest of the install, since we know them they did it for free
moral of the stupidly long story
Pay money for the instal not the unit